Air-brake.



No. 68I,045. Patented Aug. 20, |90I.

G w. evaluaron.

AIR BRAKE.

(Application led Nov. 21, 1900.)

(No llodsl.)

1n: Noam Penas co. Pnomuma., nlm-mm. u. c.

` sectional side elevation of the same.

UNITE nrns GEORGE W. EDGINGTON, OF OOALVILLE, UTAI-I.

AIR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 681,045, dated August20, 1901.

Application led November Z1, 1900. Serial No. 37,195. (No model.)

To @ZZ whom t may concern:

Beit known that I, GEORGE W. EDGINGTON, a citizen of the United States,and a resident of Coalville, in the county of Summit and State of Utah,have invented a new and Improved Air-Brake, of which the following is afull, clear, and exact description. A

The invention relates to flnid-pressure brakes of the Westinghouse andother types; and its object is to provide certain new and usefulimprovements in fluid-pressure brakes whereby the brakes are instantlyset when the truck-wheels leave the rails.

The invention consists of novel features and parts and combinations ofthe same, as Will be fully described hereinafter and then pointed out inthe claims.

A practical embodiment of the invention is representedmin theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

-Figure l is an end elevation of a car equipped with my improvement,parts being shown in section. Fig. 2 is a longitudinal Fig. 3 is anenlarged side elevation of the air-discharge valve, and Fig. 4; is atransverse section of the same on the line 4: 4 in Fig. 3.

The train-pipe A of a iiuid-pressure brake of any approved constructionis secured in the usual manner to the under side of a carbody B, and `insaidtrain-pipe is arranged an air-discharge valve C, having its valve O'in the form of'a disk and normally held to its l seat by a spring O2, asplainly illustrated in Fig. 3, so that the air-valve is normally closed.The under side of the valve O is adapted to be engaged by a cam D on alever D, fulcrumed at D2 on the bottom of the valve-casing, and thelever-arm D3 of said cam-lever extends transversely through an elongatedopening E in an arm E, rigidly secured to a member of the truck B. Aspreviously stated, the valve C' is held to its seat by the Spring C2during the ordinary running of the car, so that the engineerA can applyand release the brakes in the usual manner. When the truck, however,runs 0E the rails and assumes an angularposition relatively to thecar-body B, then the fixed arm E imparts a swinging motion to thecam-lever D, so that the cam end D thereof lifts the valveAO off itsseat and opens the air-discharge valve to the outer air, and therebyallows escape of air from the trainpipe. As soon as this takes place thebrakes are set in the usual manner, and consequently the derailed carinstantly comes to a standstill.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. An air-brake havingatrain-pipe secured to acar-body, an air-discharge Valve on the train-pipe and normally closed,a cam-lever pivoted at one end and adapted to engage the valve to openit when moved from its normal position, and a iixed arm with which thecam-lever is loosely connected, substantially as described.

2. An air-brake havinga train-pipe secured to a car-body, anair-discharge valve on said train-pipe and normally closed, and a devicecontrolled by the car-truck, to open said valve and allow escape of airfrom the trainpipe to set the brake, said device comprising a cam-leverfulcrumed at one end on said valve-body and adapted to lift the valve oiits seat, and an arm fixed to the car-truck and having an elongatedopening through which extends the arm of said cam-lever, as set forth.

3. In an air-brake, the combination with a train-pipe, a valve-casingthereon, and a spring-pressed valve in said casing, of a camleverpivoted at one end to the valve-casing

